Here's a video of them making a larger more traditional structure: https://www.youtube.com/watch?v=ViqzfPW6TFo

Though part of the point is that you can use this to make more complicated structures with less effort and error; whether they are always appropriate is sort of a separate question.

I think they have included wiring costs based on comments here & on reddit, though their site seems to be down after the HN hug.

Personally I'm more interested in modular construction than 3d printing since it's much clearer how you scale that up to larger buildings, but this is still neat.